Changes in directory llvm/lib/Target:
README.txt updated: 1.58 -> 1.59
---
Log message:
add a bad case evan though of.
---
Diffs of the changes: (+32 -0)
README.txt | 32 ++++++++++++++++++++++++++++++++
1 files changed, 32 insertions(+)
Index: llvm/lib/Target/README.txt
diff -u llvm/lib/Target/README.txt:1.58 llvm/lib/Target/README.txt:1.59
--- llvm/lib/Target/README.txt:1.58 Sun Mar 18 17:41:33 2007
+++ llvm/lib/Target/README.txt Sat Mar 24 01:01:32 2007
@@ -377,3 +377,35 @@
regs and bswap, like itanium.
//===---------------------------------------------------------------------===//
+
+LSR should know what GPR types a target has. This code:
+
+volatile short X, Y; // globals
+
+void foo(int N) {
+ int i;
+ for (i = 0; i < N; i++) { X = i; Y = i*4; }
+}
+
+produces two identical IV's (after promotion) on PPC/ARM:
+
+LBB1_1: @bb.preheader
+ mov r3, #0
+ mov r2, r3
+ mov r1, r3
+LBB1_2: @bb
+ ldr r12, LCPI1_0
+ ldr r12, [r12]
+ strh r2, [r12]
+ ldr r12, LCPI1_1
+ ldr r12, [r12]
+ strh r3, [r12]
+ add r1, r1, #1 <- [0,+,1]
+ add r3, r3, #4
+ add r2, r2, #1 <- [0,+,1]
+ cmp r1, r0
+ bne LBB1_2 @bb
+
+
+//===---------------------------------------------------------------------===//
+
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